Grand Slam tennis tournaments always throw up a special moment or two, a decent storyline, and usually a fitting crescendo.But the Australian Open is different. Everywhere you turn there are stories.Yesterday, Roger Federer and Venus Williams, aged 35 and 36 respectively, advanced to the final four. Today it was the turn of Rafael Nadal, who hasn’t reached a Grand Slam semifinal in more than two years, Serena Williams, who is 35 years of age and chasing 23 Grand Slam titles, Grigor Dimitrov, who finally looks like coming of age, and the best of the lot - Mirjana Lucic-Baroni - who reached a semifinal 18 years after her first. 'This moment has made my life,' she said.With all of that in mind, Catherine Whitaker (Eurosport) and David Law (BBC 5 Live) didn’t really know where to start, so they asked Mark Petchey what he makes of it all instead.Can Federer win title No.18? Will Nadal stop him in the final again? Is Stan Wawrinka going to ruin everyone’s party the way he can? Or is Dimitrov ready to... See acast.com/privacy for privacy and opt-out information.